Which Canadian wood species combination does Western Red Cedar, Eastern White Cedar, and/or Eastern Hemlock fall under?

Western Red Cedar, Eastern White Cedar, and Eastern Hemlock all fall under the Canadian wood species category known as Northern Species. The most up to date information available on the standard grading rules for Canadian lumber is available through the National Lumber Grades Authority. The NLGA publishes a document which is available for free download on their website. The free document provides a list of common species combinations with the individual species included in them on page 9.